mccann



J. J. McCANN.

BOILER COUPLING.

APPLICATION FILED FEB. I. 1919.

Patented Nov. 11, 1919.

2 SHEETSSHEET I.

g; yea-aw 5 imhnly 4 x L516 WITNESSES a 'IfiH EIVTOR A TTOR/VEVS J. JMcCANN.

BOILER COUPLING.

APPLICATION FILED FEB. I. 1919.

Patented Nov. 11, 1919.

2 SHEETS-SHEEI 2.

f Hark 19767? ATTORNEYS WITNESSES i 6 JOSEPH J. MOGANN, 0E CINCINNATI,OHIO.

lacuna-COUPLING.

Specification of Letters Eatent. I Patented NOV. 11, 1919.

Application filed February'l, 1919. Serial-No. 274,401.

To all whom it may concern:

Be it known that I, JOSEPH J. MCCANN, a citizen of the United States,and a resident of Cincinnati, in the county of Hamilton and State ofOhio, have invented new and useful Improvements in Boiler-Couplings, ofwhich the following is a specificatiom My invention is an improvement inboiler couplings, and has for its object to provide a simple andelncient coupling of the character specified.

In the drawings:

Figure 1 is a perspective view of a boiler, provided with the improvedcoupling, a part of the boiler bein broken away;

Fig. 2 is an en arged vertical section of the coupling;

Fig. 3 is a section on the line 33 of Fig. 2;

ig. 4.- is a perspective view of the coupling applied to aboilersupplied with overhead pipes;

Fig. 5 is an enlarged section of the top of the coupling, showing amodified arrangement;

F i 6 is a section on the line 66 of Fig. 5, 100 'ngin the direction ofthe arrow adjacent the line;

Fig. 7 .is a section on the line 7-7 of Fig. 4, looking in the directionof the arrows adjacent the line.

In the embodiment of the invention shown in Figs. 1 to 3, theimprovement is shown in connection with a boiler 1 supported by theusual pedestal 2. The hot water delivery pipe 3 is connected'with a T 4at the top of the boiler, the T being connected with the boiler andhaving its lateral branch connected by a pipe 5 with a water heater 6.At the lower end'of the boiler a pipe 7 leads to the range, and a pipe 8connects this ipe 7-with the lower end of the heater 6. he intake pipe 9for the cold water and the pipe 7 open into a common coupling, which isa casting 10 having at its bottom an internally and externallythreaded-nipple 11 for connection with the pipe 7, and havingintermediate its ends a threaded portion 12 for connection with thenipple 13 of the boiler. This coupling has two longitudinally extendingpassages, a passage 14 .which places the pipe 7 into communication withthe boiler, and a passage 15 which places the pipe 9 into communicationwith the boiler. The'cas'tingjhas a lateral inter-.v

pallv and externally threaded nipple 16 for connecting the passage 15with the pipe 9, and the passage 14 has its commencement at the upperend thereof flush with the bottom of the boiler, as indicated in Fig. 2.

The coupling has a polygonal portion 17 just above the nipple 16 forengagement by a wrench to turn the coupling, and the said coupling isprovided at its top with an externally threaded portion 18 which isengaged by a cap 19. This cap 19 has lateral openings 20 intermediateits ends, and avalve 21 is mounted for movement in the cap, the said capconstituting,-in efiect, a valve casing. The cap has a vent 22 at itstop, to permit the easy movement of the valve, and the valve cooperateswith the upper end of the couplin as a seat.

This valve normally coses the inlet, but it may be easily lifted underpressure to permit the entrance of water to the 'boiler. The valve,however, absolutely prevents re gurgitation from the Boiler into thewater main.

In the embodiment of the invention shown in Figs. 4: to 7, inclusive,the boiler 23 is supported by the pedestal 24, and the outlet 25 for thehot water supply 26 is at the top. The cold water from the cold watersupply 27 enters the boiler by way of a pipe opening flush with thebottom of the boiler and the other opening .at the top of the 28 whichopens into the coupling 29 at the botcoupling in the same manner as thepassage 15. The only difference between the coupling shown in Fig. 4 andthat shown in Fig. 1 is in the valve construction at the top. Thisconstruction comprises a cap 30 which is threaded on to the upper end ofthe coupling, and the said ca has lateral passages 31 for permitting theow of the water from;

the coupling into the boiler.

A valve 32 cooperates with the upper end of the coupling, and this valvehas afstem.

33 which is movable in a guide extension. 34 of the cap. A coil spring35 normally acts to seat the valve, is adapted to yield under the waterpres sure to permit the entrance of the water from the main.

It will be noticed from an inspection of Fig. 2 that the cap '19 has anoutwardly extending marginal flange 36 just above the lateral passages,and the cap 30 has a similar petticoat 37 at the same point. ThesePettiand the said springcoats deflect the water outwardl and downwardlyso that as it enters the boiler it cannot pass to the top of the boiler,but is driven toward the bottom. By the provision of the flanges whichare, in effect, deflectors, the entering water is forced against thebottom of the boiler, thus flushing the same, and preventing the depositof sediment which would tend to choke the outlet. The mechanism at thetop of the coupling is a controller and guard, for controlling theinflow of the water and for guarding against regurgitation.

I claim:

1. A coupling for connecting boilers to intake and discharge pipes andadapted to be arranged in an opening in the bottom of the boiler and toextend above and below the bottom of the boiler, said coupling havingtwo longitudinally extending passages, one of the passages opening atthe bottom of the coupling and adapted for connection with the dischargepipe and the otheropening laterally near the bottom and adapted forconnection with the intake, said last named passage opening at the topof the coupling, and .the other of the said passages opening at thelevel of the bottom of the boiler, a cap having threaded engagement withthe top of the coupling, the cap having oppositely arranged ports, and avalve in the cap normally closing the passage and adapted to be liftedby the water pressure, said cap having means for defiectingthe enteringwater outwardlyand downwardly, and a spring normally holding the valveclosed.

2. A couplin for connecting boilers to intake and disc arge pipes andadapted to be arranged in an opening in the bottom of the boiler and toextend above and below the bottom of the boiler, said couplinghaving'two longitudinally extending passages, one of the passagesopening at the bottom of the coup ing and adapted for connection withthe discharge pipe, and the other opening laterally near the bottom andadapted for connection with the intake, said last named passage openingat the top of the coupling, and the other of the said passages openingat 'the'level of the bottom of the boiler, a cap having threaded engaement with the top of the coupling, the cap aving oppositely arrangedports, and a valve 1n the cap normally closing the passage and adaptedto be lifted by the water pressure, said cap having means for deflectingthe entering water outwardly and downwardly.

3. A coupling for connecting boilers to intake and discharge pipes andadapted to be arranged in an opening in the bottom of the boiler and toextend above and below the bottom of the boiler, said coupling havingtwo longitudinally extending passages, one of the passages openin at thebottom of the coupling and adapts. for connection with the dischargepipe, and the other opening laterally near the bottom and adapted forconnection with the intake, said last named passage opening at the topof the coupling, and the other of the said passages opening at the levelof the boiler, a cap having threaded engagement with the top of thecoupling, the cap, having oppositely arranged ports, and a valve in thecap normally closing the passage and adapted to be lifted by the waterpressuire.

JOSEPH JHMGCANN.

Witnesses:

Wmmm H. FENNELL, W'Amnn M. Mmmn.

